苯酚类化合物在超微粒表面光解自由基的研究  

ESR Studies of Active Free Radicals Produced in the Degradation Processes of Phenol Derivatives on the Surface of Superfine Colloid Particles

作　　者：王海[1] 陈德文[1] 徐广智[1] 

机构地区：[1]中国科学院化学研究所分子动态及稳态结构国家重点实验室,北京100080

出　　处：《物理化学学报》1994年第7期597-603,共7页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金

摘　　要：研究了苯酚及其衍生物在超细微粒二氧化钛表面的光诱导电子转移和光化学反应过程，结果表明，在碱性条件下，苯酚类化合物较易于光降解，所生成的主要自由基为氢原子和苯氧基，体系中的羟基来源于超氧负离子基，而并非经由氢氧根HO-失去电子后转变为HO，文中对于光诱导电子转移及有关光反应机理进行了分析讨论。The photo-induced electron transfer and photochemical of processes phenol and its derivatives on the surface of superfine titanium dioxide colloid particles were studied. It was demonstrated that phenol was more ready to degradate on colloid surface in basic solution. The main degradation products are hydrogen atom and benzene-oxyl radical. The hydroxyl radical of the system was formed from superoxide radical, and not from hydroxide anion. The mechanisms of the photo-induced electron transfer and photochemical reactions were discussed.

关 键 词：苯酚 胶体 光降解 游离基 二氧化钛 

分 类 号：O625.312[理学—有机化学]